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167 lines
6.8 KiB
TypeScript
167 lines
6.8 KiB
TypeScript
/**
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* Copyright 2017 Google Inc. All rights reserved.
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* Modifications copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { CRSession } from './crConnection';
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import { helper } from '../helper';
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import { valueFromRemoteObject, getExceptionMessage, releaseObject } from './crProtocolHelper';
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import { Protocol } from './protocol';
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import * as js from '../javascript';
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export class CRExecutionContext implements js.ExecutionContextDelegate {
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_client: CRSession;
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_contextId: number;
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constructor(client: CRSession, contextPayload: Protocol.Runtime.ExecutionContextDescription) {
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this._client = client;
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this._contextId = contextPayload.id;
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}
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async rawEvaluate(expression: string): Promise<js.RemoteObject> {
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const { exceptionDetails, result: remoteObject } = await this._client.send('Runtime.evaluate', {
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expression: js.ensureSourceUrl(expression),
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contextId: this._contextId,
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}).catch(rewriteError);
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if (exceptionDetails)
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throw new Error('Evaluation failed: ' + getExceptionMessage(exceptionDetails));
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return remoteObject;
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}
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async evaluate(context: js.ExecutionContext, returnByValue: boolean, pageFunction: Function | string, ...args: any[]): Promise<any> {
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if (helper.isString(pageFunction)) {
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const contextId = this._contextId;
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const expression: string = pageFunction;
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const {exceptionDetails, result: remoteObject} = await this._client.send('Runtime.evaluate', {
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expression: js.ensureSourceUrl(expression),
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contextId,
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returnByValue,
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awaitPromise: true,
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userGesture: true
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}).catch(rewriteError);
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if (exceptionDetails)
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throw new Error('Evaluation failed: ' + getExceptionMessage(exceptionDetails));
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return returnByValue ? valueFromRemoteObject(remoteObject) : context.createHandle(remoteObject);
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}
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if (typeof pageFunction !== 'function')
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throw new Error(`Expected to get |string| or |function| as the first argument, but got "${pageFunction}" instead.`);
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const { functionText, values, handles, dispose } = await js.prepareFunctionCall<Protocol.Runtime.CallArgument>(pageFunction, context, args, (value: any) => {
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if (typeof value === 'bigint') // eslint-disable-line valid-typeof
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return { handle: { unserializableValue: `${value.toString()}n` } };
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if (Object.is(value, -0))
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return { handle: { unserializableValue: '-0' } };
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if (Object.is(value, Infinity))
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return { handle: { unserializableValue: 'Infinity' } };
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if (Object.is(value, -Infinity))
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return { handle: { unserializableValue: '-Infinity' } };
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if (Object.is(value, NaN))
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return { handle: { unserializableValue: 'NaN' } };
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if (value && (value instanceof js.JSHandle)) {
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const remoteObject = toRemoteObject(value);
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if (remoteObject.unserializableValue)
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return { handle: { unserializableValue: remoteObject.unserializableValue } };
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if (!remoteObject.objectId)
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return { handle: { value: remoteObject.value } };
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return { handle: { objectId: remoteObject.objectId } };
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}
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return { value };
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});
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try {
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const utilityScript = await context.utilityScript();
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const { exceptionDetails, result: remoteObject } = await this._client.send('Runtime.callFunctionOn', {
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functionDeclaration: `function (...args) { return this.evaluate(...args) }${js.generateSourceUrl()}`,
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objectId: utilityScript._remoteObject.objectId,
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arguments: [
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{ value: functionText },
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...values.map(value => ({ value })),
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...handles,
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],
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returnByValue,
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awaitPromise: true,
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userGesture: true
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}).catch(rewriteError);
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if (exceptionDetails)
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throw new Error('Evaluation failed: ' + getExceptionMessage(exceptionDetails));
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return returnByValue ? valueFromRemoteObject(remoteObject) : context.createHandle(remoteObject);
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} finally {
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dispose();
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}
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}
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async getProperties(handle: js.JSHandle): Promise<Map<string, js.JSHandle>> {
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const objectId = toRemoteObject(handle).objectId;
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if (!objectId)
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return new Map();
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const response = await this._client.send('Runtime.getProperties', {
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objectId,
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ownProperties: true
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});
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const result = new Map();
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for (const property of response.result) {
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if (!property.enumerable)
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continue;
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result.set(property.name, handle._context.createHandle(property.value));
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}
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return result;
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}
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async releaseHandle(handle: js.JSHandle): Promise<void> {
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await releaseObject(this._client, toRemoteObject(handle));
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}
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async handleJSONValue<T>(handle: js.JSHandle<T>): Promise<T> {
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const remoteObject = toRemoteObject(handle);
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if (remoteObject.objectId) {
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const response = await this._client.send('Runtime.callFunctionOn', {
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functionDeclaration: 'function() { return this; }',
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objectId: remoteObject.objectId,
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returnByValue: true,
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awaitPromise: true,
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});
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return valueFromRemoteObject(response.result);
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}
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return valueFromRemoteObject(remoteObject);
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}
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handleToString(handle: js.JSHandle, includeType: boolean): string {
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const object = toRemoteObject(handle);
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if (object.objectId) {
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const type = object.subtype || object.type;
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return 'JSHandle@' + type;
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}
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return (includeType ? 'JSHandle:' : '') + valueFromRemoteObject(object);
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}
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}
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function toRemoteObject(handle: js.JSHandle): Protocol.Runtime.RemoteObject {
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return handle._remoteObject as Protocol.Runtime.RemoteObject;
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}
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function rewriteError(error: Error): Protocol.Runtime.evaluateReturnValue {
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if (error.message.includes('Object reference chain is too long'))
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return {result: {type: 'undefined'}};
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if (error.message.includes('Object couldn\'t be returned by value'))
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return {result: {type: 'undefined'}};
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if (error.message.endsWith('Cannot find context with specified id') || error.message.endsWith('Inspected target navigated or closed') || error.message.endsWith('Execution context was destroyed.'))
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throw new Error('Execution context was destroyed, most likely because of a navigation.');
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if (error instanceof TypeError && error.message.startsWith('Converting circular structure to JSON'))
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error.message += ' Are you passing a nested JSHandle?';
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throw error;
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}
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